Powder-press.



PATENTEMGT. 1a, 1904.

A. I. DU ON'L POWDER PRESS.

APPLICATION FILED JUNE 11, 1904.

4 BHEETS-BHEET 1.

NO MODEL.

z 3 7 Q a 6% I WITNESSES.- 6- f v I I %2 W W No. 772,670. I 7 PATENTED 007. 18,1904.

I A.,I DU PONT.

POWDER PRESS.

APPLICATION rum) mm 1. 1904. 7

N0 MODEL. 7 4 snnnrs-snnnw 2.

No. 772,670. PATENTED OUT. 18, 1904. A. I. DU PONT.

POWDER PRESS.

APPLICATION FILED JUNE 11, 1904. N0 MODEL. 4 SHEETS-SHEET 3.

PATENTED OCT. 18, 1904.

A. I. m1 PONT. POWDER PRESS.

APPLIUATIOH FILED HIKE 11, 1904.

4 SHEETS-SHEET 4.

N0 MODEL.

I INVEIITDR 7 BY K/M? 7L1)! I mmgsszs: 25 2* UNITED STATES Patented. October 18, 1904.

PATENT OFFICE.

POWDER-PRESS- srncrrrcnrron forming part of Letters Patent No. 772,670, datedOctober 18, 1904.

' Application filed June ll, 1904.. Serial N0. 212,136. (No model.) i i To ctZZ whom it may cancer-ra p v Be it known that I, ALFRED I. DU Pour, a

citizen of the United statesresiding at VVilmington, county of Newcastle, and State of Delaware, have invented a new and useful Improvement in PowdenPresses, of which the following is a full, clear, and exact description, reference being. had to the accompanying drawings, which form a part of this specification. V

My invention relates to certain improvements in powder-presses used to compress the upreviously-formed powder into cakes or briquets, afterwhich the powder is broken into Speaking generally, such presses. comprise a chamber open at one end, having a fixed bottom and a fixed end or tail block, forming the closed end of said chamber. The sides .of saidchamber are movable for the purpose of insertingthepowder and removing the same after compression. The powder is compressed in the chamberby means of a plunger at the open end of the chamber moving into the chamberand compressing the powder held between the plates in front of it. .In these machines the side. walls of the. chamber have ordinarily been supported in position and against the pressure of the powder under the action .of the plunger by means of wedges or wedge-blocks.

- The difiiculty withsuch method is that to release the sides to remove the powder the wedges have to be driven outby mallets, which as the pressure of the compressed powder against the sides is great is very diflicult and quite liable to cause accidents or explosions.

My improvement specifically has for its object to avoid this difliculty. To accomplish this result, I move the sides into proper position and maintain them in that position and release them by means of devices carried by the press and which positively move and hold the sides. The devices I have used are cams, which in the following specification are shown as eccentrics. I can also insert between the devices and the sides blocks of non-sparkable material which prevent such friction as will cause the production of sparks, with the consequent danger of explosions, and also enable appliances connected therewith.

I the wear to beitaken on thesev blocks, which may be replaced when worn. Preferably the sides rest against or are secured to movable uprights having a limited movement, against which the devices above describedthe eccentricsact.

I will now describe the embodiment of my invention illustrated in the accompanying drawings, in which Figure 1 is a plan view of the press. I Fig. 2 is a central longitudinal section of Fig. 1. Fig. 3 is across-section taken on the line 3 3, Fig.2. Fig. A is a cross-section taken on the line 4. 4:, Fig. 2. Fig. 5 is a cross-section taken on the-line 5 5, Fig.2. Fig. 6 is an enlarged cross-section of the trough and Fig. '7 is a plan view of Fig. 6.. Fig. 8 is a side elevation of Fig. 6 with a portion. of the trough broken away to show the interior arrangement. ,Fig. 9 is a plan view of one of the cross-bars on which the trough rests. Fig- 10 is a perspective view of one of the briquets formed by the press.

The press-is preferablysupported on a, built-up timber foundation H, made to the requirements. A is the pressure-cylinder, bolted to timber foundation, receiving its pressur .me-

dium, preferably water, through theirilet S, and s is a cup-leather placed suitablywithin the cylinder to prevent leakage, n v

Gris a plunger, suitably placed withinflthe cylinder A, having the enlarged head 9 This head g has connected to it the rods g,

to which are connected the pull-back chains,

9, leading over the pulleys m to weightfrod Z, carrying weights L. I

M is a bracket projectingfrom cylinder A and whichcarries the pulleys m.

The chamber in which the powder is compressed consists of the tail-block B, forming one end of the pressing-chambenthe bottom portion E, and theside portions F, all preferably formed of wood. The tail-block B has the lugs or extensions 6. The cylinder A has the lugs or extensions a.

C represents stay-rods connecting the tailblock extensions 5 and the cylinder extensions at. These stay-rods have suitable shoulders and collars c for distancing the cylinder and tail-block and also securing the rods thereto.

D represents cross-bars, as shown in the form of I-bars, which are placed at suitable distances beneath the bottom portion E of the chamber, and extend from side to side thereof. These cross-bars are carried by the timber foundation H.

The sides F are loose, not being fixedly connected. They are maintained in position in the following manner: P represents a number of vertical standards which have the reduced end portions 10. These standards with respect to each of the sides are equal in number to the cross-bars D, and the reduced end portions p thereof fit into recesses (Z in the cross-bars D, forming a loose connection, whereby the standards may be moved against the sides F or withdrawn therefrom. If desired, the standards P might be secured to the sides F, in which case the standards P and sides would move together. The standards P are recessed, as shown, and in said recesses are placed blocks 0', preferably of wood. In stead of wood any other material which under friction will not produce a spark may be used.

Suitably mounted on said rods C are the eccentric cams Q, one of such eccentric cams being placed opposite each standard P, the eccentric cams acting against the blocks 9. Resting upon the top edges of the sides F are rails I, having the handles K connected therewith. Connected to each of these rails I are the tapering pieces or gage-boards J, which are set at a suitable distance apart, and when the rails rest upon the top edges of the sides F these tapering pieces. or gage-boards J project downward into the pressing-chamber, supported at suitable distances apart. In the spaces between successive pieces or gageboards J and extending across the chamber are placed the plates R. The pieces J thus act as gage-boards to properly space apart the plates R. A sufficient number of pieces or gage-boards J are used so as to extend the full length of the pressing-chamber, which in practice is about ten feet and for the purpose of easily handling each rail is made into a plurality of sections, three being shown, the joints being indicated at 2', and each section is provided with a handle K.

The press thus described is particularly designed for compression of black powder into briquets, which are subsequently broken up into grains of different sizes for making the various powders of different grades. 1n practice, the machine being in the condition described, powder is loaded into the pressingchamber between the plates. The eccentrics are operated so as to act upon the blocks 9, carried by the standards P, so as to hold the sides F. Then by means of the handles K the rails, with the gage-boards J, are removed from the pressing-chamber. The pressure medium is then admitted to the cylinder A, which forces the plunger Gr forward. The head of said plunger Gr, forming one end of the pressing-chamber in the forward movement of the plunger Gr, compresses the powder between the plates R. In practice the pressure is about thirty-five hundred pounds per square inch. The plunger moves forward a distance equal to that of the first section of the rail I and is maintained in that position a short time sufficient to give the desired set to the powder briquets or cakes. The pressure is then released and the plunger is moved back, due to the action of the weights L, to its initial position. The first section of the rail 1, with its pieces or gage-boards J and additional division-plates R, are put in position, more powder being added between these additional plates R. After the insertion of this powder between the new plates the rail and pieces or gage-boards J are removed. Power is again admitted to the cylinder A and the piston moved forward again until the whole charge of powder is sufficiently compressed. The pressure is then released and plunger again moves back, due to the action of the weights L. The cams Q are then turned so as to release the sides F, and the plates and powder cakes or briquets are taken out from the pressing-chamber.

As may be seen, with my improved mech" anism the sides may be put in proper position and after the insertion of the powder held there during the compression action. It may also be seen that the desired power is exerted upon the sides to resist the pressure due to pressing action of the plunger. ltmay also be seen that after the powder has been pressed into briquets or cakes by turning the eccentric the sides may be released and the powder removed without the use of mallets and without the slightest danger of sparking.

Having now fully described my invention, what I claim, and desire to protect by Letters Patent, is

1. In a powder-press, in combination, a pressing-chamber provided with a loose side, a cam adapted to support said side and an interposed removable block of non-sparkable material.

2. In a pmvder-press, in combination, a pressing-chamber, provided with a loose side, a movable upright against which said side rests, one or more cams carried by the machine, acting on said upright.

3. In a powder-press, in combination, a pressing-chamber provided with a loose side, a movable upright against which said side rests, one or more cams carried by the machine, acting on said upright and interposed removable block or blocks of non-sparlmble material.

4. In a powder-press, in combination, a

pressing-chamber, provided with a tail-blockv and loose side or sides, stay-rods for the tailblock, devices movably carried by the stayrods and adapted in their movement to support and resist pressure upon the side or sides.

5. In a powderpress, in combination, a pressing-chamber, provided with a tail-block and loose side or sides, stay-rods for the tailblock, devices movably carried by the stayrods and adapted in their movement to support and resist pressure upon the side or sides and interposed non sparkable removable blocks. a v

6. In a powder-press, in combination, a pressing-chamber provided with a tail block and loose side or sides, uprights carried by the machine so as to have a limited movement,

against which uprights said side or sides rest,

I devices movably carried by the stay-rods and adapted in their movement to move the uprights.

7. In a powder-press, in combination, a pressing-chamber provided with a tail-block and loose side or sides, uprights carried by the machine so as to have a limited movement against which uprights said side orsides rest, devices movably carried by the stay-rods and adapted in their movement to move the up.- rights, removable blocks of non-sparkable material interposed between said devices and uprights. v

8. In a powderpress, in combination, a pressing-chamber,provided with a tail-block and loose side-or sides, stay-rods for the tail-- block, eccentrics movably carried by the stayrods and adapted in their movement to support and resistpressure upon the side or sides.

9. In a powder-press, in combination, a pressing-chamber, provided with a tail-block and loose side or sides, stay-rods for the tailblock, eccentrics movably carried by the stayrods and adapted in their movement to sup,- port and resist pressure upon the side or sides and interposed non sparkable removable blocks. 1

10. In a powder-press, in combination, a pressing-chamber provided with a tail-block and loose side or sides, uprights carried by the machine so as to have a limited movement against which said side or sides rest, eccentrics movably carried by the stay-rods and adapted in their movement to move the uprights.

11. In a powder-press, in combination, a pressing-chamber provided with a tail-block and loose side or sides, uprights carried by the machine so as to have a limited movement against which said side or sides rest, eccentrics movably carried by the stay-rods and adapted in their movement to move. the uprights. movable blocks of non-sparkable material interposedbetween said eccentrics and uprights.

12. In a powder-press, in combination, a pressing-chamber provided witlra loose side or sides, uprights carried by the machine so ,as to have a limited movement against which as to have a limited movement. against which uprights said side or sides rest, cams carried by the machine adapted in their movement to move the uprights.

14:. In a powder-press, in combination, a

pressing-chamber, provided with a loose side or s1des, cr0ss-bars provided with recesses,

uprights loosely fitting in said recesses,

,movement to move the uprights.

In testimony of which invention I have hereunto set my hand at Wilmington onthis 7th.

day of June, 1904:. ALFRED I. DU

Witnesses:

G. A. MADDOX, J. L. DASHIELL.

Point. 

